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Acceptance of straight seam steel pipe
1. The inspection and acceptance of straight seam steel pipes shall be carried out by the technical supervision department of the supplier. 2. The supplier guarantees that the delivered straight seam steel pipes meet the requirements of the corresponding product standards. The buyer has the right...Read more -
Quenching technology of straight seam welded pipe
Straight seam welded pipe surface quenching, tempering, heat treatment is usually carried out by induction heating or flame heating. The main technical parameters are surface hardness, local hardness and effective hardened layer depth. Hardness testing can use Vickers hardness tester, Rockwell or...Read more -
Pipeline leak monitoring system
The pipeline leakage monitoring system is the pipeline leakage information management, which monitors the liquid (crude oil or other liquids) transportation pipelines throughout the day, minute and second. Once the pipeline leaks, the monitoring system can alarm in time through its information ma...Read more -
Classification of pipeline trenchless technology
Trenchless technology can be divided into three categories: laying new pipelines, repairing and replacing old pipelines, and detecting the original pipeline network. 1.Construction techniques for laying new pipelines: shield method, pipe jacking method, pilot / directional drilling pipe laying me...Read more -
Adaptability of epoxy resin coated steel pipe
Epoxy resin coated steel pipe coating is a thermosetting plastic, which combines the advantages of steel and plastic, and its scope of application includes: 1. Fire sprinkler system and domestic water supply and drainage; 2. Gas drainage, mud transportation and ventilation system in the coal mine...Read more -
The difference between plastic-lined steel pipe and steel-plastic composite pipe
The difference between plastic-lined steel pipe and steel-plastic composite pipe 1. Toxicity The steel-plastic composite pipe is a five-layer composite pipe. The inner layer is non-toxic and non-polluting, but the main material of the inner layer of the plastic-lined steel pipe is epoxy resin pow...Read more -
What is plastic-lined composite steel pipe?
An emerging composite pipe material, referred to as steel-plastic pipe. There are many classifications of steel-plastic composite pipes, which can be classified according to the structure of the pipe: steel belt reinforced steel-plastic composite pipe, seamless steel pipe reinforced steel-plastic...Read more -
The difference between galvanized products
1) Both the inner and outer walls of the hot-dip galvanized steel pipe are galvanized, while the cold-galvanized steel pipe is only galvanized on the outer wall. 2) The cold plating layer is uniform and the thickness is very thin; the hot plating layer is thick and the thickness is not uniform. ...Read more -
Technical Requirement for Welded Steel Pipe
According to the API/ASTM standards, there are many technical requirements for producing welded steel pipe. The nominal pipe diameter ranges from 6-150mm, nominal wall thickness ranges from 2.0-6.0mm and the length of the pipe is usually from 4 to 10. The pipe surface should be smooth, no collaps...Read more -
Groove connection pipe fittings
Groove connection pipe fittings include two broad categories of products: ①The fittings that play the role of connection sealing include rigid joints, flexible joints, mechanical tees and grooved flanges; ②Pipe fittings for connection transition include elbows, tees, tees, reducers and blind plat...Read more -
Common defects in the welding zone of spiral steel pipes
Common defects in the welding zone of spiral steel pipes bubble Air bubbles mostly occur in the center of the weld bead, and hydrogen is still hidden in the weld metal in the form of air bubbles. The main reason is that the surface of the welding wire and flux has moisture, which is used directly...Read more -
Points to note when cutting rectangular tubes
Points to note when cutting rectangular tubes 1. For the place to be cut, wipe off the oil, debris or mud on the surface of the rectangular tube with a rag or soft cloth. 2. Be sure to select special stainless steel cutting tools. 3. According to the construction drawing and the situation on site...Read more